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(No Model.)

E. G. AGHESON.

CONDUCTOR 0F ELECTRICITY. No. 342,892; Patented June 1, 1886.

H2253; .Emzfar: 4/ a I y 3 UNITED STATES PATENT OFFICE.

EDXVARD G. ACHESON, OF NE\V YORK, N. Y.

CONDUCTO R OF ELECTRICITY.

SPECIFICATION forming part of Letters Patent No. 342,892, dated June 1,1886.

Application filed January 26, 1886. Serial No. 189,840.

To all whom it may concern.-

Be it known that I, EDVARD G. ACHESON, a citizen of the United States,and a resident of the city, county, and State of New York, have inventedcertain new and useful Improvements in Conductors of Electricity, ofwhich the following is a specification.

My invention relates to electrical conductors and more particularly tothat class of conductors which are provided with metallic shields orcoverings for the purpose ofintcrcepiing the inductive action ofneighboring electric currents.

The object of my invention is to produce a cheap, effective, and durableconductor; and it consists in such a conductor constructed substantially as hereinafter set forth.

Referring to the accompanying drawings, forming part of myspecification, Figure 1 is a longitudinal view of a portion of theconductor, partially in section; and Fig. 2 is a transverse section.

The primary conductor A is of any suitable material and size to suit therequirements of the case andis enveloped in an insulating material, I3,preferably composed of fibrous material and some hydrocarbon of a ratherhigh melting-point, as asphaltum. Over this insulating material is ametal tube or sheath, 0, and this is so formed that it is thin andflexible and'of good conducting material, as copper deposited byelectrolytic process. Upon this sheath or tube, especially if formed byelectrolysis, I apply a layer or coating, D, of metal in the form of afusible alloy that serves to prevent the sheath from scaling off.Instead of the alloy, the coating may be made 01' some organic orinorganic substances, as fibrous materials and coal-tar or asphaltum andearths. The object of this coating is primarily to serve as a mechanicalcoat (No model.)

ing and protector of the insulated conductor, so that the material to beused is unimportant. In some instances it may be desirable to use boththe metal coating and the fibrous envelope. If the inclosing metallicsheath is continuous it may be used as one limb of the complete metalliccircuit-that is, it may form the return-circuit, or it may be connect-edto the earth at its extremities or at intervals along the line. If thesheath is not continuous it will still serve to protect the main orinner conductor from the disturbing influences of induction fromneighboring wires, as it will act as a true magnetic shield to the mainconductor, and thereby prevent the disturbing effects of the neighboringwire without conducting the induced currents to ground.

I do not herein make any claim to the method of manufacturing theconductor described, as that is claimed in my application Serial No.189,839, filed simultaneously herewith.

Having thus described my improvement, what I claim is 1. An electricconductor consisting ola linewire, an insulating covering for the same,a continuous homogeneous metallic shield of thin and flexible material,and a protective covering, substantially as described.

2. An electric conductor consisting of a line wire, an insulatingcovering of fibrous mate rial and asphaltum, a thin flexible shield ofelectrolytically-deposited copper, a coating of a metallic alloy, and aprotecting-coating, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDVARD G. AOHESON.

\Vitnesses:

GEO. J. l\'[ERRTLL, B. T. BURNHAM.

